In reality, preventing the 9/11 attacks would have required a combination of effective intelligence, security measures, and international cooperation. A fictional novel wouldn't have had the power to do so. It's more of a fictional concept than a practical possibility.
First, we should respect the animals' space. Don't get too close to their habitats or nests. For example, if you're in a bear - inhabited area, stay away from places where bears might be hiding their cubs. Second, make noise when you're in the wilderness. This can alert animals to your presence and they are less likely to be startled and attack. For instance, when hiking, you can talk or clap your hands from time to time.
In this novel, the alien might be a lost one from its fleet. It stumbles upon the cabin where the family lives. The family initially thinks it's just a strange animal or something. But when the attacks start, they realize it's an otherworldly creature. They could barricade themselves inside the cabin at first. Then they might try to find a way to communicate with the alien. If that fails, they would have to resort to more drastic measures to protect themselves like using fire or any weapons they might have in the cabin. It would be a story of survival against an unknown and powerful enemy.
The plot might involve the dragon seeking revenge on the Freys for some past wrong. Maybe the Freys had wronged someone the dragon was attached to, so it attacks their strongholds, burns their lands, and causes chaos among them.
It could be an old enemy who has resurfaced and found a way to turn Naruto against the Leaf. Maybe Orochimaru, who has always been interested in Naruto's power, manipulates him into attacking the village. Orochimaru could use his knowledge of dark jutsu to influence Naruto's mind.
In this fanfiction, perhaps Naruto could be under some sort of mind control. Maybe an enemy has found a way to manipulate him into attacking the Leaf. It could also be a case where Naruto is misled about the true nature of the Leaf Village, believing it has committed some great wrong that warrants his attack.
One possible plot could be that Kakashi is under a genjutsu. In this fanfiction, an enemy ninja might have cast a powerful genjutsu on Kakashi, making him see Naruto as a threat to the village. So, Kakashi attacks Naruto, but Naruto, being the understanding person he is, tries to break the genjutsu instead of fighting back right away.
Perhaps there's a time - travel element involved. Naruto from the future, who has been through some horrible experiences, travels back in time and, in a state of confusion or rage, attacks Kushina. Or it could be that a powerful villain has the ability to manipulate Naruto's emotions and uses that power to make him turn on his mother. This would create a very complex and dark plotline that challenges the normal Naruto narrative.
In some fanfictions, it might be due to an alternate timeline or reality. A change in the past could lead to Kushina having different beliefs or loyalties. It could also be related to a new power or curse that affects her judgment and causes her to see Naruto as an enemy. However, this is often a very dark and dramatic turn in fanfiction stories.
In this kind of fanfic, perhaps Harry has finally had enough of the Dursleys' mistreatment. He might use his magic in a moment of rage. Maybe he starts by levitating Dudley to teach him a lesson after one too many taunts. Or he could use a spell to make Aunt Petunia's precious china smash, as a way of getting back at her for all the years of neglect and cruelty.
In some fanfics, Batman might attack Robin due to mind control. For example, if a villain like the Joker manages to get his hands on some new technology or a powerful magic item that allows him to manipulate Batman's mind. Another reason could be a misunderstanding. Maybe Robin was framed for something he didn't do, and Batman, in his haste to seek justice, attacks without fully understanding the situation. It could also be a part of a darker, alternate universe story where the characters' personalities are twisted, and Batman has turned to the dark side for some reason.